CAJ | 학술논문

为了研究高压交流交联聚乙烯（XLPE）电缆老化状态与绝缘空间电荷特征的关系,通过测量高压交流交联聚乙烯（XLPE）电缆不同位置绝缘的空间电荷特性,分析了老化方式对XLPE电缆空间电荷分布规律的影响。采用电声脉冲（PEA）法测量XLPE内空间电荷分布规律,发现未老化电缆铝电极附近积累同极性电荷,而老化后电缆的铝电极附近积累异极性电荷。沿电缆径向由内向外,未老化电缆及实际运行22a电缆电荷量增高,加速老化1a电缆电荷量降低。分析认为,加速老化电缆的老化可能起始于电缆绝缘内侧,实际运行电缆老化可能起始于电缆绝缘外侧。结果表明不同老化状态下交流XLPE电缆绝缘空间电荷行为明显不同,空间电荷测量可以作为评价交流XLPE电缆老化状态的有效手段。
위료연구고압교류교련취을희（XLPE）전람노화상태여절연공간전하특정적관계,통과측량고압교류교련취을희（XLPE）전람불동위치절연적공간전하특성,분석료노화방식대XLPE전람공간전하분포규률적영향。채용전성맥충（PEA）법측량XLPE내공간전하분포규률,발현미노화전람려전겁부근적루동겁성전하,이노화후전람적려전겁부근적루이겁성전하。연전람경향유내향외,미노화전람급실제운행22a전람전하량증고,가속노화1a전람전하량강저。분석인위,가속노화전람적노화가능기시우전람절연내측,실제운행전람노화가능기시우전람절연외측。결과표명불동노화상태하교류XLPE전람절연공간전하행위명현불동,공간전하측량가이작위평개교류XLPE전람노화상태적유효수단。
In order to investigate the relationship between the aging state of HV AC XLPE cable and the characteristic of space charge of XLPE,we studied the space charge distribution of HVAC XLPE cables under different aging modes.Moreover,we adopted pulsed electro-acoustic（PEA）method to measure the evolution of space charge inside the insulating materials that were got from different position of AC cables.It is found that the total charge amount of insulating materials from un-aged cables and cables under actual operation increases along the radial direction from inner to outer,while the total charge amount of insulating materials from accelerated aging cables decreases.Space charge of accelerated aging cables starts from the inside of the insulating materials,while it starts from the outside of cables aged under normal operation.It is suggested that the space charge characteristics of AC XLPE cable insulation varies with its aging state obviously,thus the space charge measurement can be used as an effective method for aging state assessment of AC XLPE cable.